A Quick 3g Update for Costa Rica

I have found this coverage map for the entire country. I think it may well explain why I don't have a stable or strong or fast internet experience. The full map is found here:

http://www.gsmworld.com/cgi-bin/ni_map.pl?x=0&y=0&z=0&cc=cr&net=ic


This is an insert showing my immediate area: